Macro assert_pred 

macro_rules! assert_pred {
    ($($content:tt)*) => { ... };
}

Asserts that the given predicate applied to the given arguments returns true, panicking if it does not.

Note for users of GoogleTest for C++: This differs from the ASSERT_PRED* family of macros in that it panics rather than triggering an early return from the invoking function. To get behaviour equivalent to ASSERT_PRED*, use verify_pred! with the ? operator.